Could be a sticking needle/seat or a stuck float in one of the carbs. The
fuel delivery rate is slowed down enough that it can't keep up once the revs
are up and the carb slowly goes dry. We encountered this problem on a Shasta
trip with Ross' 2000. Finally solved it by banging sharply on the carbs.
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of snyler
Sent: Wednesday, January 15, 2003 11:39 AM
To: datsun-roadsters@autox.team.net
Subject: Re: Test
It's been going on for months now, I've checked into every lead I
could, and still my 70 1600 is running terribly. Idles fine, takes
off fine once warm, pulls okay until 4000 rpm, falls on its face and
coughs and sputters until I stop when it settles into an okay idle.
I'm ready to shoot it and part it out and get something dependable
like a fiat or MG!!! It could well be i'm just not doing the carbs
right (in fact I know they're out of whack now) but the gradual (but
not too gradual)onset of the problem would seem to point elsewhere.
Is there good clear easy to understand (for a novice) carb balancing
guide? Everything I've found is vague, confusing, self
contradictory, or some combination of those lovely qualities.
70 1600 desmogged, recurved Dist
checked timing mechanical and vacuum advance
checked for vacuum leaks
checked vacuum piston operation
found two different main jets, replaced questionable one with one
matching normal one (got worse)
AS far as tuning carbs, I think I'm getting farther away, not closer
(but like I say the problem onset didn't seem like a carb tuning
issue)
Marc T.
Tired of this 2000lb smelly paperweight!
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